Guide for camera usage in DB410c(1) - Hardware part

这篇博文中,我们将探讨DragonBoard 410c的相机子系统的硬件知识,包括OV5645传感器、CAMSS和CCI,为后续的调试和优化提供清晰的工作流程。

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大家好,这篇博文我们会先介绍下DB410c camera subsystem相关的硬件知识点,有助于我们理清楚camera work的flow,对后续的debug和optimization有章可循。

Introduction


The Linaro Debian releases for the DragonBoard 410c include drivers for:

  • OV5645 camera sensor
  • Qualcomm Camera Subsystem (CAMSS)
  • Qualcomm Camera Control Interface (CCI)

OV5645


The OV5645 is a 5MP MIPI CSI2 camera sensor. The driver supports three sensor modes:

  • 2592x1944 15fps (full frame)
  • 1920x1080 30fps (cropped from full frame)
  • 1280x960 30fps

The driver was accepted upstream and is expected in the Linux Kernel v4.13. It is also backported in the Linaro releases kernel branches.

CAMSS


The Camera Subsystem hardware found on 8x16 processors consists of:

  • 2 CSIPHY modules. They handle the Ph
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